From 629faa7e3bbaaa3e84ef5d76d6c6c02f0d4de0ae Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Sat, 1 Sep 2018 01:02:03 +0200
Subject: [PATCH] Improve ModelStorage.copy

* Allow callable in copy default
* Support dotted notation in copy default
* Use setdefault in copy
* Copy default when needed
* Do not set default state in copy
* Use callable and dotted notation in copy default

issue5576
issue7648
review72291002
---
 party.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/party.py b/party.py
index b108e6f34d..21d0b2adb4 100644
--- a/party.py
+++ b/party.py
@@ -189,8 +189,9 @@ class Party(DeactivableMixin, ModelSQL, ModelView, MultiValueMixin):
     def copy(cls, parties, default=None):
         if default is None:
             default = {}
-        default = default.copy()
-        default['code'] = None
+        else:
+            default = default.copy()
+        default.setdefault('code', None)
         return super(Party, cls).copy(parties, default=default)
 
     @classmethod